Persistent Systems interview questions
Online test → Online test → Technical → Technical → HR·94% entry level
CS fundamentals
Showing 37 of 353 reported in this area
Predict the output of a given C program.
What is the difference between a hub and a switch?
Explain advanced OOPs concepts with examples
Write a SQL query to find the second highest salary from the Employee table.
Explain ACID properties in DBMS
What is the final keyword in Java?
Explain aggregate functions in SQL.
What are the differences between C and C++?
What is the difference between TCP and UDP?
What are the differences between C++ and Java?
What are data structures and what are their types?
What is polymorphism in object-oriented programming?
Explain the difference between a process and a thread
What is the difference between Encapsulation and Abstraction?
Explain the difference between call by value and call by reference.
Explain OOP concepts in C++.
Explain B-Trees and B+ Trees.
Explain TCP/IP protocol suite.
What is a dangling pointer in C?
Why is String immutable in Java?
What is the size of void in C/C++?
What is a virtual destructor in C++?
Conceptual questions on pointers in C
Conceptual questions on Cloud Computing
Explain computer networking fundamentals.
Explain how multithreading works in Java.
Explain different CPU scheduling algorithms.
Explain semaphores with respect to deadlocks.
Explain polymorphism in OOP (static and dynamic)
What does the Bootstrap Class Loader do in Java?
Explain the concept of mutex in operating systems
Explain the steps involved in deadlock prevention
What are virtual functions and why are they used?
Explain the types of different Java class loaders.
Explain deadlock and methods for deadlock avoidance
Find the 4th highest salary from an employee table.
What are virtual functions and where are they used?
DSA
Showing 11 of 156 reported in this area
Print all permutations of a given string.
Print a pyramid pattern.
Write a function to reverse a singly linked list.
Count the number of vowels from a space-separated input array
Detect a loop in a linked list
Explain different data structures.
Explain the approach of Quick Sort.
Count the number of inversions in an array
Find the minimum cost path in a matrix or graph
Implement Range Minimum Query (RMQ) on an array
Find the Kth smallest element in an unsorted array
Aptitude
Showing 3 of 28 reported in this area
Predict the output of given pseudocode snippets.
Logical reasoning questions similar to RS Agarwal reasoning problems
Determine relationships in a blood relation problem based on given information.
Puzzles
Showing 3 of 12 reported in this area
Solve logical puzzles during the interview
Given 3-liter and 5-liter jars and an infinite amount of water, measure exactly 4 liters.
Arrange numbers 1 to 9 in 9 circles forming a triangle such that the sum of each side is equal
Behavioural
Showing 3 of 6 reported in this area
What do you do if your teammate doesn't cooperate with you?
If you were given 50 lakhs INR to spend in a week, how would you spend it?
Describe a challenging situation you faced and how you handled it.
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System design
Showing 3 of 4 reported in this area
Design a database structure for an E-Commerce website
Design a system of your choice using Object-Oriented Programming (OOP) concepts
Given a real-world software development scenario, explain how you would approach the system design and implementation.
Showing 60 of 387 questions. Ranked by how often the same question came back across reports.
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What questions does Persistent Systems ask?
Candidate interview reports most often cover CS fundamentals (63%) and DSA (28%).
How many rounds does Persistent Systems interview have?
Candidate interview reports show an average of 4.1 rounds per experience, with a typical sequence of Online test → Online test → Technical → Technical → HR. Individual interview paths can vary.
Is the Persistent Systems interview hard?
Among questions with a reported difficulty, the mix is easy 59%, medium 38%, hard 2%.